Derivative Financial Instruments (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
Derivatives, Fair Value [Line Items]
Maximum term length, investment cash flow hedges	8 years
Amounts excluded from assessment of hedge effectiveness	$ 0		$ 0
Gains (losses) recognized due to hedge ineffectiveness	0		0
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	203		255
Gain (Loss) Recognized in Other Comprehensive Income	9		(8)
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	45		58
Gain (Loss) Recognized in Other Comprehensive Income	(2)		(3)
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Foreign Currency Swaps [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	118		133
Gain (Loss) Recognized in Other Comprehensive Income	1	[1]	(3)	[1]
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Combination interest rate and foreign currency swaps [Member]
Derivatives, Fair Value [Line Items]
Notional Amount	40		64
Gain (Loss) Recognized in Other Comprehensive Income	10		(2)
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Other Long Term Investments Location [Member]
Derivatives, Fair Value [Line Items]
Fair Value	3		5
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Other Long Term Investments Location [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Fair Value	2		4
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Other Long Term Investments Location [Member] | Foreign Currency Swaps [Member]
Derivatives, Fair Value [Line Items]
Fair Value	1		1
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Other Long Term Investments Location [Member] | Combination interest rate and foreign currency swaps [Member]
Derivatives, Fair Value [Line Items]
Fair Value	0		0
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Accounts Payable Accrued Expenses And Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Fair Value	15		31
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Accounts Payable Accrued Expenses And Other Liabilities [Member] | Interest Rate Swaps [Member]
Derivatives, Fair Value [Line Items]
Fair Value	0		0
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Accounts Payable Accrued Expenses And Other Liabilities [Member] | Foreign Currency Swaps [Member]
Derivatives, Fair Value [Line Items]
Fair Value	13		18
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] | Accounts Payable Accrued Expenses And Other Liabilities [Member] | Combination interest rate and foreign currency swaps [Member]
Derivatives, Fair Value [Line Items]
Fair Value	$ 2		$ 13

[1] Other comprehensive income for foreign currency swaps excludes amounts required to adjust future policy benefits for the run-off settlement annuity business.